Ubuntu
pulseaudio package

  1. Bug #221038
  2. Comment #14

Comment 14 for bug 221038

Revision history for this message
Dana Goyette (danagoyette) wrote :

I can also confirm this issue.
I have two sound cards: my onboard 2-channel HDA card (front:0), and my cardbus Audigy2 (surround51:1). I've set default-sample-channels=6 in daemon.conf, since the Audigy2 refuses to open in multichannel mode if it's already open in stereo mode.

One hopefully useful piece of information: this CPU-eating behavior only occurs when I pause a gstreamer app that's playing to the Audigy2 (surround51:1); if I move the stream to the onboard sound card, the CPU usage goes back to normal. This hints that the issue may originate somewhere in the upmixing PulseAudio does when playing streams on devices with differing numbers of channels.